It is a powerfull extension that allows you to create hot keys to quickly complete common tasks in Sitecore. This is especially useful for demos or for quick access to frequently used items. No need to repeatedly expand the content tree any longer.

it works well for Sitecore 8 as well as with all previous versions I have tested with. It also works well on Mac computers, however mac-specific keyboard extensions (ie. Cmd) are not supported. screenshot below shows settings screen:

And here is a dropdown containing list of possible actions. Quite impressive!